Grinding apparatus



(No Model.)

W. I. NICHOLS & B. BLOOMHEART.

GRINDING APPARATUS.

Nb. 542,099. Patented July 2., 1895.

UNITED STATES Pn-rrzivr- OFFICE.

WILBUR F. NICHOLS AND BILLY BLOOMHEART, OF SAN FRANCISCO, CALIFORNIA.

GRINDING APPARATUS.

SPECIFICATION forming part of Letters Patent No; 542,099, dated July 2,1895. Application filed September 18, 1894. Serial No- 523,413. (No model.)

T0 at whom it may concern:

Be it known that we, WILBUR F. NIcHoLs and BILLY BLOOMHEART, citizens of the United States, residing in the city and county of San Francisco, State of California, have invented an Improvement in Grinding Apparatuses; and we hereby declare the following to be'a full, clear, and eXact description of the same.

Our invention relates to the general class of machines or apparatuses for grinding tools.

It consists of the constructions and combinations of parts hereinafter fully described and claimed.

Though our apparatus can be used for grinding various tools or implements, it is specially intended for sharpening shears, to which use it is particularly applicable, as it holds the shears-blade accurately at the proper angle and guides its edge equally throughout its length, and this without the exercise of any skill on the part of the operator, thus enabling any one-barbers, tailors, and the like-to sharpen shears when needed without delay or expense.

Referring to the accompanying drawing for a more complete explanation of ourinvention, the figure is a perspective view of our device.

A is a supporting-frame of suitable character. It is here shown as a hopper or watercontaining vessel secured to a base-plate B t. in any suitable manner.

O is a grinding-wheel fixed on a shaft 0, to which rotation is imparted by any proper means, as by the hand-crank c. The shaft 0 is freely slidable lengthwise in its bearings on the sides of hopper A, and the width of said hopper is such as to permit a lateral movement or side travel of the grinding-wheel sufficient to carry it along the length of a shears-blade.

Upon the front edge of hopper A are lugs a, in which is fitted, removably a shaft D. Upon this shaft is pivoted a bracket E, in the upper end of which is pivoted, upon a horizontal pin J", an arm F, which is adapted to be adjusted in an arc in vertical plane and to be fixed where adjusted by a thumb-nut f.

. Upon the top of arm Fare pivoted the jaws of a clamp G, which said clamp is adapted to be moved in a plane at right angles to the plane of adjustment of the arm F. It is partially tightened by a nut g. The jaws of the clamp are opened and tightened by meansof ascrew g and thumb-nut g Upon the opposite edge of hopper A are lugs a, in which the shaft D and bracket E, with its various attachments, may be fitted to provide for sharpening a left-handed shears.

The operation of the apparatus is as follows; Theshears S are held in the clamp g with the bladein the position indicated. The swinging of the bracket E throws the blade up to general position or swings it down entirely out of the way. The movements of arm F about its pivot pinfthrows the clamp G to such a position as to perfectly adjust the blade to the proper bevel or angle on the stone, and

this angle is preserved by tightening up nut f. The swinging of the clamp about the arm F as a pivot provides for turning the blade, to cause its rounded end (if it has one) to follow the stone. feed of the grinding wheel or stone causes it to move equally over the entire length of the blade. This travel is effected by the hand of the operator as he turns the crank c. The bracket E is adjustable along the shaft D. This provides for the reception of shears of different lengths.

Having thus described our invention, What we claim as new, and desire to secure by Letters Patent, is-

1. A grinding apparatus consisting of a hopper having lugs, with a shaft mounted therein, a swinging bracket on the shaft, a vertical arm adjustable upon a horizontal pivot in the bracket, a horizontal clamp turnable about said vertical arm, a slidable rotary shaft mounted on the ends of the hopper and a grinding wheel on said shaft and having a lateral travel or feed along the length of the tool edge.

2. A grinding apparatus comprising a hopper adapted to contain water, having lugs projecting from its opposite sides forming bearings, a shaft removably mounted so that it may be fitted in the lugs on opposite sides The lateral or side of the hopper, a. clamp carried by the removable shaft, Vertical and horizontal pivots about which the clamp is tnrnable, a longitudinally slidable rotary shaft mounted in the frame centrally between the lugs at opposite sides, and parallel With the first named shaft, and provided with a grinder.

In witness whereof we have hereunto set our hands.

WILBUR FJNICHOLS. BILLY BLOOMHEART. Vitnesses:

W. B. BENCI-ILEY, V. C. SADLER. 

